So true, they dont have issues. I do know they strip the lr of anything trying from embrio to grow. So if you planned coraline you gonna battle unless you have loads already. But on your tank size there should be plenty to graze on.

_____________________________________________" DO IT FOR THE LOVE OF THE OCEAN "LIFE IS TOO SHORT TO SAY I'M SORRY SO DON'T DO WRONG TO YOUR LOVED ONES.

hi all I am whanting to get a long spine urchin for my fowler tank it is a standerd 4 ft tank with a 3ft sump can anyone tell me if this is big enough for one and how much bioload they produce? thanks

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Hi, your tank is plenty big enough and they do not add a lot to the bioload. You just need to be careful when working in the tank as the tips of their spines are extremely sharp and if you get pricked it really really really stings, a lot.